A108330 Integers k such that 10^k - 29 is a prime number.

2, 3, 5, 7, 8, 13, 14, 761, 794, 2216, 3710, 3860, 3937, 5091, 7754, 29091

Offset: 1

Author

Julien Peter Benney (jpbenney(AT)ftml.net), Jun 30 2005

Keywords

• nonn
• more

Comments

The next term, if one exists, is > 100000. - Robert Price, Apr 25 2011

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "99971".

Examples

			k = 8 is a term because 10^8 - 29 = 100000000 - 29 = 99999971, which is prime.
		

Links

• Makoto Kamada, List of near-repdigit-related prime numbers.
• Index entries for primes involving repunits.

Crossrefs

Cf. A089675, A095714, A092767.

Extensions

a(14)-a(15) from Sean A. Irvine, Mar 04 2010

a(16) from Robert Price, Dec 15 2010

Edited by Ray Chandler, Dec 23 2010